Improvement in curtain-fixtures or rolling shutters



UNITED STATES PATENT OFFICE. L

CHARLES H. REYNOLDS, OF WILLIAMSBURG, NEW YORK, ASSIGNOR 'IO HIMSELF AND HENRY O. RICHARDSON, OF SAME PLAGE.

IMPROVEMENT IN CURTAIN-FIXTURES QR ROLLING SHUTTERS.

Specification forming part of Letters Patent No. 147,862; dated February 24, 1874; application tiled October 18, 1873.

To all whom t may concern Be it known that I, GHARLEs H. REYNOLDS, of Williamsburg, in the county of Kings and State of New York, have invented a new and useful Improvement in Rolling-,Shutter Apparatus, of which thefollowing is a specification:

Figure l is a view, showing my improvements as applied to a rolling shutter. Fig. 2 is a detail side view of the wheel. Fig. 3 is a detail section of the same. Fig. 4 is a detail view of the clutch.

Similar letters of reference indicate corresponding parts.

The invention will rst be fully described, and then pointed out in the claims.

A represents the posts or frame of the window or door, in bearings attached to which the journals of the shaft B revolve. O reprel sents the rolling shutter, which is constructed and attached to theshaft B in the ordinary manner. D is a ring, which I prefer to make ot cast-iron, and which is made with two or more notched or perforated projections or lugs, d, upon its inner or concave surface, to receive the bolts e, by which the two circular plates or disks E are secured to each other and to the said ring D. rIhe plates E are made larger than the ring D, so as to project beyond it and form a groove to receive the hoisting-strap. To the inner side of the wheel E D E is bolted a iianged socket, F, which is made square, or of other form, to receive the shaft B, so that the said wheel may carry the said shaft with it in its revolution. The socket F may be bolted to the shaft B, if desired. G is the hoisting-strap, one end of which is attached to the wheel E D E F. The strap Gr is wound around the wheel E D E F, and should be of such a length that its free end may hang down 1 sufficiently low to be conveniently reached and operated to raise or roll up the shutter. The strap Gr is held to support the shutter in any desired position by the clamp, consisting` of the base H, to which are pivoted two cams, I, the faces of which are corrugated or roughened to cause them to take a firm hold upon the straps Gr. Upon the inner ends of the cams I are formed gear-wheels or segments of gearwheels J, the teeth of which mesh into each other, so that the two cams I may move exactly together. Uponvone of the cams I is formed a lever, K, for convenience in operating* the cams I to grasp and release the strap G. The shutters are usually made of iron, and are very heavy, so that great power has to be applied to the strap G in raising and lowering them. To remedy this I apply a counterbalA ancing weight to the shaft B. This weight is a chain, L, of such a size as to give a weight suflicient to balance the shutter G. To the upper end of the chain L is attached one end of a strap, M, which is wound around the shaft B in the opposite direction from the strap G, and its other end is attached to the said shaft B. The chain L should be made of such a length that its lower end, when the shutter is fully lowered, may swing clear of the iioor. As the shutter is raised so as to diminish its downward draft upon the side of the shaft B, the lower end of the chain L comes in contact with the iloor, so as to diminish the downward draft upon the other side of the said shaft. In this way the shutter will be exactly balanced, however much or little it may be rolled up, the weight adjusting itself to the weight of the shutter. By this construction, the shutter may be conveniently raised and lowered with little expenditure of power.

The chain L may be replaced by a series of separate weights attached to a strap or chain, if desired.

Having thus described my invention, I claim Vas new and desire to secure by Letters Pat'- ent- l. The combination of ringD, havingnotched projections d and the diametrically-larger side plates E E, with the transverse bolts, as and for the purpose described. Y

2. The combination, with iron shutters O and roll B, of a counterbalance-weight, formed of metallic links or chainL, as and for the purpose specified.

CHARLES H. REYNOLDS.

Witnesses:

J AMES T. GRAHAM, T. B. lldOSHER.` 

